Dr. Ronald J. Stewart, DO
- Medicare services, 2024
- 651
- Medicare patients, 2024
- 101
- Part D claims, 2024
- 3,614
- Hospital affiliations
- 3
- Industry payments
- $2,869
- Practice address
- 645 Barclay Cir, Rochester Hills, MI 48307
- Practice phone
- Call (248) 844-1010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Advanced Cardiology Associates
Rochester Hills, Michigan
Find Dr. Stewart's professional email, personal email and mobile number
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Dr. Ronald J. Stewart is a cardiologist in Rochester Hills, Michigan
Dr. Stewart practices at Advanced Cardiology Associates in Rochester Hills, Michigan.
Dr. Stewart's NPI, 1801889654, was assigned on August 26, 2005. Dr. Stewart holds Michigan license RS005546.
- NPI
- 1801889654NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597843748
- NPI enumeration date
- August 26, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (248) 844-1010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 87
- Medical school graduation
- 1965
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronald J. Stewart practices at Advanced Cardiology Associates in Rochester Hills, Michigan
Dr. Stewart's primary practice is Advanced Cardiology Associates, at 645 Barclay Cir, Rochester Hills, MI 48307 in Oakland County. The practice phone is (248) 844-1010.
- Advanced Cardiology Associates645 Barclay Cir, Rochester Hills, MI 48307 · Oakland CountyPhone(248) 844-1010
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ronald J. Stewart is affiliated with 6 sites of care and 2 medical groups
Dr. Stewart's primary practice is Advanced Cardiology Associates in Rochester Hills, Michigan. Dr. Stewart is also affiliated with Corewell Health Beaumont Troy Hospital. The medical group on file is Advanced Cardiology Associates. Dmand AI also links Dr. Stewart to 2 more hospitals, 1 physician office, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ronald J. Stewart's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stewart practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Advanced Cardiology Associates | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ronald J. Stewart is one of 768 cardiologists in Michigan
Cardiovascular disease is Dr. Stewart's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Stewart is licensed in Michigan.
Specialties and state licenses
- Cardiovascular disease, MichiganPrimary
Cardiologists near Dr. Stewart
Counts of cardiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ronald J. Stewart billed Medicare for 651 services in 2024
CMS data shows 651 Medicare services from Dr. Stewart across 10 procedure codes in 2024, for 101 Medicare patients. Medicare paid $75,759 for them. Every service was in an office.
Dr. Stewart's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5462024: 42223%
- Tests and treatments
- 2023: 2882024: 12756%
- Other services
- 2023: 922024: 6826%
- Imaging
- 2023: 462024: 3426%
- Drugs given in the office
- 2023: 732024: 0100%
Dr. Stewart compared with the Michigan median for cardiologists, 2024
- Dr. Stewart
- Michigan median
- Medicare services
- 651vs 1,43555% below
- Medicare patients
- 101vs 64484% below
- Part D claims
- 3,047vs 1,56295% above
Medians across 749 cardiologists in Michigan with Dmand AI profiles that report each measure.
Dr. Stewart's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Stewart and other cardiologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ronald J. Stewart treated 101 Medicare patients in 2024, average age 78
CMS counts 101 Medicare patients who saw Dr. Stewart in 2024. The largest group is 75 to 84, with 56 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.32, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Stewart's median patient age at 76, with 43% women.
Dr. Stewart's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Stewart's Medicare patients by sex, 2024
- Women4646%
- Men5554%
Chronic conditions among Dr. Stewart's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease65%
- Arthritis57%
- Diabetes27%
- Atrial fibrillation23%
- Chronic kidney disease22%
- Heart failure22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Stewart's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women43%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ronald J. Stewart wrote 3,614 Medicare Part D claims in 2024
In 2024, Dr. Stewart wrote 3,614 Medicare Part D claims for 180 patients. 84% of them were for generic drugs. CMS names the drug for 3,047 of them, across 69 drugs with 11 or more claims each, at $412,735 in total drug cost. In 2023, CMS named 2,989 claims across 68 drugs.
Dr. Stewart's Part D claims by kind of drug, 2024
- Generic3,025 claims84%
- Brand-name570 claims16%
- Other19 claims1%
Dr. Stewart's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Stewart's Part D claims, 2024
- Antibiotics2%76 of 3,614 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,9892024: 3,0472%
Drugs named by CMS: 69 in 2024, 68 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Ronald J. Stewart takes part in Medicare
Dr. Stewart accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ronald J. Stewart received $2,869 in industry payments from 2016 to 2025
CMS Open Payments shows 156 general payments to Dr. Stewart from 29 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Amgen Inc. paid the most, $491.
General payments to Dr. Stewart by program year, 2016 to 2025
General payments to Dr. Stewart by kind, 2016 to 2025
- Food and beverage$2,76796%
- Debt forgiveness$883%
- Education$140%
Companies that paid Dr. Stewart the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ronald J. Stewart's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ronald J. Stewart
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ronald J. Stewart's NPI number?
Dr. Ronald J. Stewart's NPI number is 1801889654. It was assigned on August 26, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald J. Stewart?
Dr. Ronald J. Stewart is a cardiologist in Rochester Hills, Michigan. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Ronald J. Stewart practice?
Dr. Stewart practices at 645 Barclay Cir, Rochester Hills, MI 48307. Dr. Stewart's primary practice is Advanced Cardiology Associates in Rochester Hills, Michigan. Dmand AI also links Dr. Stewart to 2 hospitals, 1 physician office, 1 group practice or clinic and 1 medical group.
What is Dr. Ronald J. Stewart's office phone number?
The practice phone on file for Dr. Stewart is (248) 844-1010.
What is Dr. Ronald J. Stewart's medical license number?
Dr. Stewart holds Michigan license RS005546.
Which hospitals is Dr. Ronald J. Stewart affiliated with?
Dr. Stewart is affiliated with Corewell Health Beaumont Troy Hospital. Dmand AI links Dr. Stewart to 2 more hospitals.
What medical group is Dr. Ronald J. Stewart part of?
Dr. Stewart is linked to Advanced Cardiology Associates. Dmand AI links Dr. Stewart to 1 more medical group.
Does Dr. Ronald J. Stewart accept Medicare?
Yes. CMS data shows Dr. Stewart billed Medicare for 651 services in 2024, and Dr. Stewart accepts Medicare assignment.
How many Medicare patients does Dr. Ronald J. Stewart see?
CMS counts 101 Medicare patients who saw Dr. Stewart in 2024, with an average age of 78.
What services does Dr. Ronald J. Stewart bill to Medicare?
In 2024, Dr. Stewart's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medical supplies or transport (A9502).
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What drugs does Dr. Ronald J. Stewart prescribe most?
In 2024 Medicare Part D data, Dr. Stewart's most prescribed drugs by claims were Losartan Potassium, Atorvastatin Calcium and Levothyroxine Sodium.
Has Dr. Ronald J. Stewart received payments from drug or device companies?
CMS Open Payments shows $2,869 in general payments to Dr. Stewart from 29 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Ronald J. Stewart been practicing?
Dr. Stewart graduated from medical school in 1965, 61 years ago.
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